- 著者
- Shingo Ueno Tatsunori Hirai Shusuke Sato Manish Biyani Hiromi Kuramochi Ryo Iizuka Takanori Akagi Takashi Funatsu Takanori Ichiki
- 出版者
- The Society of Photopolymer Science and Technology (SPST)
- 雑誌
- Journal of Photopolymer Science and Technology (ISSN:09149244)
- 巻号頁・発行日
- vol.28, no.5, pp.719-725, 2015-06-22 (Released:2015-10-20)
- 参考文献数
- 12
- 被引用文献数
- 1 4
The improved catalytic activity of enzymes is required in various fields. Enzymes have conventionally been improved by the screening of bacteria possessing mutant enzymes. However, the screening conditions are limited since screening requires the growth of bacteria. Here, we report the development of a protein microarray for the analysis of enzymatic activity. A his-tagged enzyme is synthesized in situ and immobilized on the microarray, which is composed of microreactors with a diameter and depth of 4 μm and a density of 1.0 x 106 reactors/cm2. β-glucosidase, synthesized in situ using a cell-free synthesis system, was immobilized on the microreactor array chip and its catalytic activity was observed. This enzyme-immobilized microarray is expected to enable the rapid and quantitative screening of enzymes.
- 著者
- Shuichi Sato Tetsuya Chikama Mikio Ohuchi
- 出版者
- The Society of Photopolymer Science and Technology (SPST)
- 雑誌
- Journal of Photopolymer Science and Technology (ISSN:09149244)
- 巻号頁・発行日
- vol.30, no.1, pp.57-67, 2017-06-26 (Released:2017-08-10)
- 参考文献数
- 12
- 被引用文献数
- 2
Photoelectric properties and drive characteristics of guest-host (GH)-type liquid crystal cells with yellow, magenta, cyan, green, and gray colors using 4-cyano-4'-pentylbiphenyl (5CB) and three diazo-based dichroic dyes were systematically investigated in different driving modes. The dichroic dyes have structures similar to 5CB; therefore, they uniformly mixed and dispersed into the liquid crystal matrix. The green and gray colors were obtained by mixing appropriate ratios of two or more dyes. Impedance of the GH cells decreased upon the incorporation of the dyes into 5CB. However, the photoelectric properties and drive characteristics of the liquid crystal cells were not altered after the inclusion of the dye. In particular, the alignment of the molecules strongly depended on the cell structure. The GH cells in twisted nematic mode exhibited a low driving voltage of approximately 1.5 V.
- 著者
- Joong-Yeon Cho Heon Lee
- 出版者
- The Society of Photopolymer Science and Technology (SPST)
- 雑誌
- Journal of Photopolymer Science and Technology (ISSN:09149244)
- 巻号頁・発行日
- vol.28, no.4, pp.541-545, 2015-05-25 (Released:2015-10-05)
- 参考文献数
- 11
- 被引用文献数
- 1
In this study, a 2 inch sized a highly periodic nanometer-scaled patterned sapphire substrate (NPSS) was fabricated using nanoimprint lithography (NIL) and inductively coupled plasma etching to improve the light-extraction efficiency of GaN-based light-emitting diodes (LEDs). Both truncated cone and cone shape patterns were fabricated on the sapphire substrate to compare the enhancement effect of light extraction efficiency of LEDs according to the shape of sapphire patterns. A blue LED structure was grown on the two different NPSS, and the photoluminescence (PL) and electroluminescence (EL) were measured to confirm the effectiveness of the two different nanometer-scaled patterns on sapphire. An improvement in luminescence efficiency was observed when NPSS was applied; 2 times stronger PL intensity and 2 times stronger EL intensity than the LED structure grown on the un-patterned sapphire substrate was measured. These results show highly periodic nanometer-scaled patterns create multi-photon scattering and effectively enhance the light-extraction efficiency of LEDs.
- 著者
- Shinji Matsui Hiroshi Hiroshima Yoshihiko Hirai Masaru Nakagawa
- 出版者
- The Society of Photopolymer Science and Technology (SPST)
- 雑誌
- Journal of Photopolymer Science and Technology (ISSN:09149244)
- 巻号頁・発行日
- vol.27, no.1, pp.61-72, 2014-07-08 (Released:2014-08-08)
- 参考文献数
- 60
- 被引用文献数
- 2 5
The effectiveness of condensable gas, used as ambience, in UV nanoimprint lithography has been demonstrated. Bubble defect problem, which is inherent in UV nanoimprint under non vacuum ambience, can be solved by PFP condensable gas. UV nanoimprint lithography using PFP was validated for 45 nm pattern fabrication under thin residual layer conditions, which are required for UV nanoimprint used as UV nanoimprint lithography. PFP reduces the viscosity and demolding force of UV curable resins. These properties are helpful in increasing the throughput and reliability of UV nanoimprint. PFP occasionally produces large shrinkages, and degrades pattern quality depending on UV curable resin. These drawbacks can be mitigated by selecting UV curable monomers with a low PFP absorption. In the end, we have demonstrated the satisfied LER and LWR values requested in 22 nm node NAND flash memories and 20,000 repeated imprints with a single mold by UV nanoimprint using PFP.
- 著者
- Tatsuyuki Nakatani Keishi Okamoto Ikuo Omura Shuzo Yamashita
- 出版者
- The Society of Photopolymer Science and Technology (SPST)
- 雑誌
- Journal of Photopolymer Science and Technology (ISSN:09149244)
- 巻号頁・発行日
- vol.20, no.2, pp.221-228, 2007 (Released:2007-09-13)
- 参考文献数
- 23
- 被引用文献数
- 18 38
The surfaces of medical materials are coated with polymer molecules or drugs in order to functionalize the surfaces in such ways as imparting biocompatibility. But in the case of inorganic materials there is the problem that polymers will have poor adhesiveness and be liable to peel. A coronary artery stent holds the vessel lumen patent by being expanded to the plastic deformation region, and if the material surfaces are coated with DLC, the coating must follow the plastic deformation of the base material. Accordingly we created a thickness-wise concentration gradient in the Si content that is added to the DLC, and discovered that thereby a DLC nanocoating is produced that does not crack under the plastic deformation required in a stent, and that has superior adhesion. In this way we succeeded in improving adhesion of the drug coating when used in combination with thin film material obtained via application of plasma surface treatment techniques, and in producing a practical stent that exhibits high biocompatibility even after slow release of the antithrombotic agent into the body is complete.